How can I see what file system mount is using when I use the "-t auto" flag?
I am using a minimal build of Yocto Linux so I cannot simply use "file" to see what it is after the fact.
man mount gives a verbose description of that case:
-toption is given, or if the auto type is specified, mount will try to guess the desired type. Mount uses the blkid library for guessing the filesystem type; if that does not turn up anything that looks familiar, mount will try to read the file
/etc/filesystems, or, if that does not exist,
/proc/filesystems. All of the filesystem types listed there will be tried, except for those that are labeled
/etc/filesystemsends in a line with a single
*, mount will read
/proc/filesystemsafterwards. While trying, all filesystem types will be mounted with the mount option silent.